Power Engineering 3B2 ch7 (Cogeneration Systems & Operation) Questions With Complete Solutions

Power Engineering 3B2 ch7 (Cogeneration Systems &
Operation) Questions With Complete Solutions


Which one of the following simple-cycle cogeneration systems
best describes this process? "Steam produced from a boiler
drives a steam turbine, which in turn drives the electric
generator. The low pressure exhaust steam from the turbine is
supplying the required heat to the process. The condensed steam
from the process is then returned to the boiler."

a. Back Pressure Steam Turbine
b. Condensing Steam Turbine
c. Waste Heat Cogeneration
d. Heat Engine Cogeneration
e. Gas Turbine
A
Which one of the following simple-cycle cogeneration systems
best describes this process? "The waste heat produced by the gas
turbine passes through an exhaust heat boiler. The steam
produced by the boiler is used for heating purposes and for an
absorption refrigeration system".

a. Back Pressure Steam Turbine
b. Condensing Steam Turbine
c. Waste Heat Cogeneration
d. Heat Engine Cogeneration
e. Gas Turbine

,E
Which one of the following simple-cycle cogeneration systems
best describes the process? "Fuel burned to produce heat for a
process and then to use the waste heat from the process to
produce steam in the boiler. The steam from the boiler is fed to
the steam turbine to turn an electric generator. The low pressure
exhaust steam from the steam turbine is used to drive another
turbine on to provide heat to the feedwater heaters."

a. Back Pressure Steam Turbine
b. Condensing Steam Turbine
c. Waste Heat Cogeneration
d. Heat Engine Cogeneration
e. Gas Turbine
C
Which one of the following simple-cycle cogeneration system
best describes this process? "The heat engine turns and electric
generator and the exhaust gases from the heat engine provides
the heat source for the heat recovery unit".

a. Back Pressure Steam Turbine
b. Condensing Steam Turbine
c. Waste Heat Cogeneration
d. Heat Engine Cogeneration
e. Gas Turbine
D

,Combined cycle cogeneration refers to the production of
electricity from __________________________________.

a. one source utilizing one fuel source
b. two sources utilizing two fuel sources
c. two sources utilizing one fuel source
d. one source utilizing two fuel sources
e. three sources utilizing one fuel source
C
Which one of the following cogeneration systems best describes
this process? "The fuel is burned in a conventional gas turbine
combustor. The gas turbine is connected to an electrical
generator. The exhaust from the gas turbine is then used as
combustion air to mix with fuel burned in the boiler. The steam
produced from the boiler is used to drive a steam turbine which
is connected to a second electrical generator".

a. Back Pressure Steam Turbine Cogeneration
b. Waste Heat Cogeneration
c. Gas Turbine Cogeneration
d. Combined-cycle Steam/Gas Turbine Cogeneration
e. Combined-cycle Gas/Steam Turbine Cogeneration
E
Which one of the following cogeneration systems requires
neither an FD nor ID fans for the boiler?

a. Back Pressure Steam Turbine

, b. Condensing Steam Turbine
c. Open Cycle Gas Turbine
d. Combined-cycle Steam/Steam Turbine
e. Combined-cycle Gas/Steam Turbine
E
Which one of the following cogeneration systems best describes
this process? "The compressor driven by the gas turbine supplies
pressurized combustion air to mix with fuel and burned in the
boiler. The steam produced by the boiler is used to drive a steam
turbine which is connected to an electrical generator. The
exhaust gases from the boiler are then fed to the gas turbine
which is connected to a second electrical generator."

a. Back Pressure Turbine
b. Waste Heat
c. Gas Turbine
d. Combined-cycle Steam/Gas Turbine
e. Combined -cycle Gas/Steam Turbine
D
The term HRSG stands for:

a. High Return Steam Generator
b. Heat Recovery Superheated Generator
c. Hot Return Steam Generator
d. Heat Recovery Steam Generator
e. Heat Return Steam Generator
D